/* PalettePicker - Professional Color Palette Generator */

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Professional Light Theme */
    --bg-primary: #ffffff;
    --bg-secondary: #fafbfc;
    --bg-tertiary: #f5f7fa;
    --bg-elevated: #ffffff;
    --border-color: #e4e7eb;
    --border-light: #f0f2f5;
    --text-primary: #1a202c;
    --text-secondary: #4a5568;
    --text-tertiary: #718096;
    --accent-primary: #5b63d3;
    --accent-hover: #4c54b8;
    --accent-light: #eef0fd;
    --accent-lighter: #f7f8fe;
    --success: #0ca678;
    --success-light: #e6f7f1;
    --danger: #e53e3e;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.03);
    --shadow-md: 0 2px 8px 0 rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 8px 24px 0 rgba(0, 0, 0, 0.12);
    --shadow-xl: 0 16px 48px 0 rgba(0, 0, 0, 0.15);
    --shadow-card: 0 1px 3px 0 rgba(0, 0, 0, 0.04), 0 1px 2px 0 rgba(0, 0, 0, 0.02);
}

/* Dark Theme */
body.dark-mode {
    --bg-primary: #0d1117;
    --bg-secondary: #0d1117;
    --bg-tertiary: #161b22;
    --bg-elevated: #161b22;
    --border-color: #30363d;
    --border-light: #21262d;
    --text-primary: #e6edf3;
    --text-secondary: #a5b1c2;
    --text-tertiary: #7d8590;
    --accent-primary: #7c85db;
    --accent-hover: #8b93e0;
    --accent-light: #1c2128;
    --accent-lighter: #161b22;
    --success: #3fb68b;
    --success-light: #1b2e26;
    --danger: #f85149;
    --shadow-sm: 0 0 transparent;
    --shadow-md: 0 0 transparent;
    --shadow-lg: 0 0 transparent;
    --shadow-xl: 0 0 transparent;
    --shadow-card: 0 0 transparent;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Inter', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: var(--bg-secondary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    transition: background-color 0.2s ease, color 0.2s ease;
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 2.5rem 2rem;
    position: relative;
}

/* Theme Toggle Button */
.theme-toggle {
    position: fixed;
    top: 1.5rem;
    right: 1.5rem;
    width: 44px;
    height: 44px;
    border-radius: 10px;
    background: var(--bg-elevated);
    border: 1px solid var(--border-color);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 1000;
    box-shadow: var(--shadow-card);
}

.theme-toggle:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
    border-color: var(--accent-primary);
    background: var(--accent-lighter);
}

.theme-toggle:active {
    transform: translateY(0);
}

.theme-toggle svg {
    width: 18px;
    height: 18px;
    color: var(--text-secondary);
    transition: all 0.2s ease;
}

.theme-toggle:hover svg {
    color: var(--accent-primary);
}

.theme-toggle .sun-icon {
    display: block;
}

.theme-toggle .moon-icon {
    display: none;
}

body.dark-mode .theme-toggle .sun-icon {
    display: none;
}

body.dark-mode .theme-toggle .moon-icon {
    display: block;
}

/* Header - Professional Layout */
header {
    text-align: center;
    margin-bottom: 3rem;
    padding: 1.5rem 0;
}

.logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.875rem;
    margin-bottom: 0.75rem;
}

.logo-icon {
    width: 40px;
    height: 40px;
}

header h1 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.025em;
}

.subtitle {
    font-size: 1rem;
    color: var(--text-secondary);
    font-weight: 500;
    margin-bottom: 0.5rem;
    letter-spacing: -0.01em;
}

.description {
    font-size: 0.9375rem;
    color: var(--text-tertiary);
    max-width: 560px;
    margin: 0 auto;
    line-height: 1.6;
}

/* Controls - Professional Layout */
.controls {
    background: var(--bg-elevated);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    box-shadow: var(--shadow-card);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1.5rem;
    flex-wrap: wrap;
}

.control-section {
    flex: 1;
    min-width: 180px;
}

.control-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.control-group label {
    color: var(--text-tertiary);
    font-size: 0.8125rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

select {
    padding: 0.625rem 0.875rem;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    background: var(--bg-primary);
    color: var(--text-primary);
    font-size: 0.9375rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.15s ease;
    font-family: inherit;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg width='12' height='8' viewBox='0 0 12 8' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 1.5L6 6.5L11 1.5' stroke='%234a5568' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.75rem center;
    padding-right: 2.5rem;
}

select:hover {
    border-color: var(--accent-primary);
    background-color: var(--accent-lighter);
}

select:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px var(--accent-light);
}

.button-group {
    display: flex;
    gap: 0.75rem;
}

.btn {
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    border: none;
    font-size: 0.9375rem;
    font-weight: 600;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    transition: all 0.15s cubic-bezier(0.4, 0, 0.2, 1);
    font-family: inherit;
    white-space: nowrap;
    letter-spacing: -0.01em;
}

.btn-primary {
    background: var(--accent-primary);
    color: white;
    box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
    background: var(--accent-hover);
    box-shadow: var(--shadow-md);
    transform: translateY(-1px);
}

.btn-primary:active {
    transform: translateY(0);
    box-shadow: var(--shadow-sm);
}

.btn-secondary {
    background: var(--bg-elevated);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background: var(--accent-lighter);
    color: var(--accent-primary);
    border-color: var(--accent-primary);
}

/* Info Banner */
.info-banner {
    display: flex;
    justify-content: center;
    gap: 2rem;
    padding: 1rem 1.25rem;
    background: var(--accent-lighter);
    border: 1px solid var(--accent-light);
    border-radius: 10px;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.info-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-tertiary);
    font-size: 0.8125rem;
    font-weight: 500;
}

.info-item svg {
    color: var(--accent-primary);
    flex-shrink: 0;
}

kbd {
    background: var(--bg-elevated);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    padding: 0.125rem 0.375rem;
    font-family: ui-monospace, 'Cascadia Code', 'Source Code Pro', Menlo, Monaco, 'Courier New', monospace;
    font-size: 0.75rem;
    font-weight: 600;
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
    color: var(--text-secondary);
}

/* Palette Grid */
.palette {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.25rem;
    margin-bottom: 3rem;
}

.color-card {
    background: var(--bg-elevated);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    overflow: hidden;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    cursor: pointer;
    box-shadow: var(--shadow-card);
}

.color-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    border-color: var(--text-tertiary);
}

.color-display {
    height: 140px;
    position: relative;
    transition: all 0.2s ease;
}

.color-card:hover .color-display {
    height: 160px;
}

.lock-btn {
    position: absolute;
    top: 10px;
    right: 10px;
    background: rgba(255, 255, 255, 0.95);
    border: 1px solid rgba(0, 0, 0, 0.06);
    border-radius: 7px;
    padding: 0.4rem;
    font-size: 1.125rem;
    cursor: pointer;
    transition: all 0.15s;
    backdrop-filter: blur(8px);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.08);
    line-height: 1;
}

.lock-btn:hover {
    background: white;
    transform: scale(1.05);
    box-shadow: 0 3px 8px rgba(0, 0, 0, 0.12);
}

.lock-btn.locked {
    background: var(--accent-primary);
    border-color: var(--accent-primary);
}

body.dark-mode .lock-btn {
    background: rgba(22, 27, 34, 0.95);
    border-color: rgba(255, 255, 255, 0.1);
}

body.dark-mode .lock-btn:hover {
    background: rgba(22, 27, 34, 1);
}

.color-info {
    padding: 1rem;
}

.color-hex {
    font-size: 1.125rem;
    font-weight: 700;
    margin-bottom: 0.625rem;
    font-family: ui-monospace, 'Cascadia Code', 'Source Code Pro', Menlo, Monaco, 'Courier New', monospace;
    color: var(--text-primary);
    letter-spacing: 0.01em;
}

.color-values {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    margin-bottom: 0.75rem;
}

.color-value {
    font-size: 0.8125rem;
    color: var(--text-tertiary);
    font-family: ui-monospace, 'Cascadia Code', 'Source Code Pro', Menlo, Monaco, 'Courier New', monospace;
}

.copy-hex-btn {
    padding: 0.5rem 0.875rem;
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 0.8125rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.15s;
    width: 100%;
    font-family: inherit;
}

.copy-hex-btn:hover {
    background: var(--accent-primary);
    color: white;
    border-color: var(--accent-primary);
    transform: translateY(-1px);
}

.copy-hex-btn:active {
    transform: translateY(0);
}

.copy-hex-btn.copied {
    background: var(--success);
    color: white;
    border-color: var(--success);
}

/* Preview Section */
.preview-section {
    margin-top: 4rem;
}

.preview-section h2 {
    text-align: center;
    margin-bottom: 0.5rem;
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.025em;
}

.preview-subtitle {
    text-align: center;
    color: var(--text-tertiary);
    margin-bottom: 2rem;
    font-size: 0.9375rem;
}

.swatches-grid {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
    justify-content: center;
}

.swatch-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
}

.swatch-color {
    width: 80px;
    height: 80px;
    border-radius: 10px;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-card);
    transition: all 0.2s ease;
    cursor: pointer;
}

.swatch-color:hover {
    transform: translateY(-2px) scale(1.05);
    box-shadow: var(--shadow-md);
}

.swatch-label {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-tertiary);
    font-family: ui-monospace, 'Cascadia Code', 'Source Code Pro', Menlo, Monaco, 'Courier New', monospace;
}

/* Export Modal */
.export-modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    z-index: 1000;
    align-items: center;
    justify-content: center;
    padding: 1rem;
}

.export-modal.show {
    display: flex;
}

.modal-content {
    background: var(--bg-elevated);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    max-width: 720px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    animation: slideUp 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: var(--shadow-xl);
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(20px) scale(0.96);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.modal-header {
    padding: 1.5rem 2rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h3 {
    font-size: 1.375rem;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.02em;
}

.close-btn {
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--text-tertiary);
    cursor: pointer;
    transition: all 0.15s;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 6px;
}

.close-btn:hover {
    color: var(--text-primary);
    background: var(--bg-tertiary);
}

.modal-body {
    padding: 2rem;
}

.export-option {
    margin-bottom: 2rem;
}

.export-option:last-child {
    margin-bottom: 0;
}

.export-option h4 {
    margin-bottom: 0.75rem;
    color: var(--text-primary);
    font-size: 0.8125rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

.export-option pre {
    background: var(--bg-tertiary);
    padding: 1rem;
    border-radius: 8px;
    overflow-x: auto;
    font-size: 0.8125rem;
    margin-bottom: 0.625rem;
    border: 1px solid var(--border-color);
    font-family: ui-monospace, 'Cascadia Code', 'Source Code Pro', Menlo, Monaco, 'Courier New', monospace;
    color: var(--text-primary);
    line-height: 1.5;
}

.copy-btn {
    padding: 0.5rem 1rem;
    background: var(--accent-primary);
    color: white;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.15s;
    font-weight: 600;
    font-size: 0.8125rem;
    font-family: inherit;
}

.copy-btn:hover {
    background: var(--accent-hover);
    transform: translateY(-1px);
}

.copy-btn:active {
    transform: translateY(0);
}

.copy-btn.copied {
    background: var(--success);
}

/* Responsive Design */
@media (max-width: 1024px) {
    .container {
        padding: 2rem 1.5rem;
    }
    
    .palette {
        grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    }
}

@media (max-width: 768px) {
    .theme-toggle {
        top: 1rem;
        right: 1rem;
    }

    header h1 {
        font-size: 1.75rem;
    }

    .logo {
        flex-direction: column;
        gap: 0.5rem;
    }

    .logo-icon {
        width: 36px;
        height: 36px;
    }

    .controls {
        flex-direction: column;
        padding: 1.25rem;
    }

    .control-section {
        width: 100%;
    }

    .button-group {
        width: 100%;
        flex-direction: column;
    }

    .btn {
        width: 100%;
        justify-content: center;
    }

    .info-banner {
        flex-direction: column;
        gap: 0.75rem;
        padding: 0.875rem 1rem;
    }

    .palette {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    .modal-body {
        padding: 1.5rem;
    }
    
    .swatch-color {
        width: 70px;
        height: 70px;
    }
    
    .swatches-grid {
        gap: 0.5rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 1.5rem 1rem;
    }

    header h1 {
        font-size: 1.5rem;
    }

    .subtitle {
        font-size: 0.9375rem;
    }

    .description {
        font-size: 0.875rem;
    }
}

/* Scrollbar Styling */
::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-tertiary);
}

/* Print Styles */
@media print {
    .controls,
    .info-banner,
    .btn,
    .lock-btn,
    .export-modal,
    .theme-toggle {
        display: none !important;
    }

    .palette {
        page-break-inside: avoid;
    }
}